聚甲基异丙烯基酮和聚异亚丙基丙酮的不对称硅氢化反应

ASYMMETRIC HYDROSILYLATION OF POLY(ISOPROPENYL METHYL KETONE) AND POLY(MESITYL OXIDE)

光活性高分子的合成具有重要意义，它在生物活性高分子、用于不对称合成的高分子试剂或催化剂以及不对称选择性色谱柱填料等领域具有潜在的应用价值．研究表明，不对称选择性聚合反应难以获得高光学活性的高分子［１］，而手性过渡金属络合物催化的高分子不对称反应是获得...

Through asymmetric hydrosilylation of poly(isopropenyl methyl ketone) and poly(mesityl oxide), poly(3 methyl 3 buten 2 ol) and poly(4,4 dimethyl 3 buten 2 ol) with chiral alcohol groups were synthesized catalyzed by in situ catalysts prepared with chiral ligand, 2 (2 pyridyl) 4 carbomethoxy 1,3 thiazolidine, and [Rh(COD)Cl] 2. The asymmetric hydrosilylation of copolymers of isopropenyl methyl ketone or mesityl oxide with styrene (molar ratio 1∶1) was also investigated. The reactivity of these two homopolymers was lower than that of poly(methyl vinyl ketone) as the result of steric effect of methyl group.The effect of solvent on the optical rotations of the products was studied. It was found that the optical rotation was mainly caused by the chiral side alcohol group.